Many of the relics on display in the museum are stored in the constant temperature and constant humidity display cabinet because of its special nature, and the difference between the constant temperature and humidity display cabinet and the common display cabinet is with the temperature and humidity control, and what is the high efficiency ratio in the temperature and humidity control of the constant temperature and constant humidity display cabinet.
In the design of the traditional constant temperature and constant humidity air conditioning system, in the control of temperature and humidity, the unit has two kinds of air cooling and water cooling, equipped with multistage electric heater and electrode humidifying tank and microcomputer controller. Under the condition of cooling and humidifying, the evaporating coil makes the air temperature lower than the dew point temperature, and the temperature of the heater is kept in the set value by the reheat of the heater. This kind of unit is usually only second or third gear due to the adjustment of cooling capacity. The dew point temperature of the air of the unit is not easy to stabilize, and the control ability of the relative humidity in the room is low. Generally, it should be used in the test room with the precision of relative humidity control in 5%. At present, most of this type of product is used.
Simply speaking, it is the process of cooling, heating and dehumidification. Although the effect is obvious, it is clear that the air conditioning energy consumption in this process is relatively large, especially in the high humidity environment, not only to ensure the effect of dehumidification, but also to guarantee the temperature of the preset, at this time the energy consumption will be far greater than the energy consumption of the air conditioning in the general machine room.
In order to avoid this, the outdoor air can be treated to the dew point of the machine and then mixed with the indoor air return, into the dry cooling air of the main air conditioner, and control the air temperature difference within the corresponding standard range, until the cooling load in the environment is reduced to a certain value, and then the cooling water flow or the inlet temperature of the cooling coil is used. Change to adjust the cooling capacity, and further reduce the air temperature difference. In this type of air-conditioning design, special attention should be paid to its energy consumption and energy saving, and two heating should be abandoned to reduce energy consumption.